Design for spreader agitator



FIG. 1 is a top plan view of a spreader agitator showing my new design,the bottom plan being identical;

FIG. 2 is a front elevational view thereof, the rear being identical;

FIG. 3 is a side elevational view taken from the left of FIG. 1;

FIG. 4 is a side elevational view taken from the right of FIG. 1.

The ornamental design for a spreader agitator, as shown and described.